Madge Networks Token Ring Switch - Manual (Page 57)

57
Smart DeskStream Technical Presentation 57
CRF
n BRF can be configured to participate in
IBM Spanning Tree negotiation
Spanning Tree
IBM Spanning Tree Support - 2
BRF
Ring Number 102
BRF negotiates with other switches in the network
to configure the spanning tree
CRF to BRF link has a very low path cost to avoid
blocking within the DeskStream
Blocking will therefore occur at backbone port
Ring Number 101
1
2
IBM BPDU
X
As we saw in an earlier slide.